Can`t fly Hurricane

[Storm of When]

If I select any Hurricane the game refuses to run the mission, online it stops completely. I can run any single mission with any plane except the Hurricane, I can even fly against the Hurricane , but cannot fly in it. I`ve reduced settings etc, still no go.I`ve also re-installed via Steam and checked the integrity of the files, all ok.

PhenomII X4 955BE at 3600mhz
4870x2 with 11.3 drivers
4 gb ddr3 1333 ram
win7 64bit